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Acme Corporation manufactures light bulbs. The CEO claims that an average Acme light bulb lasts 300 days. A researcher randomly selects 15 bulbs for testing. The sampled bulbs last an average of 290 days, with a standard deviation of 50 days. If the CEO's claim were true, what is the probability that 15 randomly selected bulbs would have an average life of no more than 290 days?
answers the following questions using the anova source table below. the table depicts a two-way anova in which gender
find the p-value an independent random sample is selected from an approximately normal population with an unknown
Consider two urns with the following composition: Urn 1 contains 5 red and 15 black balls, Urn 2 contains 8 red and 12 black balls.
the gre combined scores for students applying to an engineering schools graduate program are normally distributed with
78 percent of the males attended college. A management trainee is selected at random. What is the probability that the person selected is a female who did attend college?
Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment.
Suppose it is known that a new treatment is successful in curing muscular pain in 75% of the cases. If it is tried on 9 patients, find the probability that fewer than 7 patients are cured.
Assuming that the distribution of the salaries is normal, what is the probability that the average for this sample is between $36,000 and $42,000.
What is the mean of the data? What is the median of the data? What is the sample standard deviation of the data?
That will reveal the interval estimate for the proportion of people who like cats within a target population of 60,000 people. How would you interpret the results?
3 section of a statistics class containing 28,32 and 35 students averaged 83,80 and 76 respectively on same final exam. what 's the combined population means of all the 3 sections ?
This indicates that about 80 out of 100 similarily constructed intervals would include the population porportion. (true or false)
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